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Exam Code:
1z1-062Exam Name: Oracle Database 12c: Installation and Administration
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1z1-062 Dumps PDF Total Q&A: 166 Questions and Answers
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Exam Code:
1z0-062Exam Name: Oracle Database 12c: Installation and Administration
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1z0-062 Free download Total Q&A: 166 Questions and Answers
Last Update: 12-23,2015
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NO.1 Which action takes place when a file checkpoint occurs?
A. The Log
Writer process (LGWR) writes all redo entries in the log buffer to online redo
log files.
B. All buffers for a checkpointed file that were modified before a
specific SCN are written to disk by
DBWn and the SCN is stored in the control
file.
C. The checkpoint position is advanced in the checkpoint queue.
D.
The Database Writer process (DBWn) writes all dirty buffers in the buffer cache
to data files.
Answer: D
1z1-062 test
answers
NO.2 Which two statements correctly describe the
relationship between data files and logical
database structures?
A. The
size of an Oracle data block in a data file should be the same as the size of an
OS block.
B. A data file can belong to only one tablespace.
C. An extent
cannot span data files.
D. A segment cannot span data files.
Answer:
B,C
1z1-062
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Reference:
https://mohibalvi.wordpress.com/tag/alter-tablespace/
NO.3 Which
statement is true about the Log Writer process?
A. It writes after the
Database Writer process writes dirty buffers to disk.
B. It writes
concurrently to all members of multiplexed redo log groups.
C. It writes when
a user commits a transaction.
D. It writes when it receives a signal from the
checkpoint process (CKPT).
Answer: C
Reference:
http://docs.oracle.com/cd/B19306_01/server.102/b14220/process.htm (see log
writer
process (LGWR))
NO.4 As a user of the ORCL database, you
establish a database link to the remote HQ database such
that all users in
the ORCL database may access tables only from the SCOTT schema in the
HQ
database. SCOTT's password is TIGER. The service mane "HQ" is used to
connect to the remote HQ
database.
Which command would you execute to
create the database link?
A. CREATE DATABASE LINK HQ USING 'HQ';
B. CREATE
PUBLIC DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING 'HQ';
C.
CREATE DATABASE LINK HQ CONNECT TO CXJRRENT_USER USING HQ' S
D. CREATE
DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING 'HQ';
Answer:
C
NO.5 Which two tasks can be performed on an external
table?
A. creating a public synonym
B. updating the table by using an
update statement
C. creating an invisible index
D. creating a view
E.
partitioning the table
Answer: A,B
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NO.6 Which three factors influence the optimizer's
choice of an execution plan?
A. cardinality estimates
B. operating system
(OS) statistics
C. object statistics in the data dictionary
D. fixed
baselines
E. the optimizer_mode initialization parameter
Answer:
A,B,E
1z1-062
practice test
Reference:
http://docs.oracle.com/cd/B19306_01/server.102/b14211/optimops.htm
NO.7
Which two statements are true about the logical storage structure of an Oracle
database?
A. Each data block always corresponds to one operating system
block.
B. An extent can span multiple segments,
C. A data block is the
smallest unit of I/O in data files.
D. It is possible to have tablespaces of
different block sizes.
E. An extent contains data blocks that are always
physically contiguous on disk.
Answer: B,D
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Reference:
http://docs.oracle.com/cd/E11882_01/server.112/e40540/logical.htm#CNCPT250
NO.8
Examine the parameters for your database instance:
NAMETYPE
VALUE
undo_management string AUTO undo_retentioninteger 12 00 undo_tablespace
string UNDOTBS1
You execute the following command:
SQL> ALTER
TABLESPACE undotbs1 RETENTION NOGUARANTEE;
Which statement is true in this
scenario?
A. Inactive undo data is retained for 1200 seconds even if
subsequent transactions fail due to lack of
space in the undo
tablespace.
B. You can perform a Flashback Database operation only within the
duration of 1200 seconds.
C. Undo data is written to flashback logs after
1200 seconds.
D. An attempt is made to keep inactive undo for 1200 seconds
but transactions may overwrite the
undo before that time has
elapsed.
Answer: C